/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8                               :vi │
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2022 Justine Alexandra Roberts Tunney                              │
│                                                                              │
│ Permission to use, copy, modify, and/or distribute this software for         │
│ any purpose with or without fee is hereby granted, provided that the         │
│ above copyright notice and this permission notice appear in all copies.      │
│                                                                              │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
│ PERFORMANCE OF THIS SOFTWARE.                                                │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/assert.h"
#include "libc/calls/syscall_support-nt.internal.h"
#include "libc/errno.h"
#include "libc/intrin/strace.h"
#include "libc/nt/files.h"
#include "libc/nt/runtime.h"
#include "libc/stdio/sysparam.h"
#include "libc/sysv/pib.h"

/**
 * Gets current directory.
 */
textwindows uint32_t GetCurrentDirectory(uint32_t nBufferLength,
                                         char16_t *out_lpBuffer) {
  int len;
  char16_t cwd[PATH_MAX];
  unassert(__get_pib()->cwd[0] == '/');
  unassert((len = __mkntpath(__get_pib()->cwd, cwd)) != -1);
  uint32_t dwLen;
  for (dwLen = 0; cwd[dwLen]; ++dwLen)
    if (dwLen < nBufferLength)
      out_lpBuffer[dwLen] = cwd[dwLen];
  if (nBufferLength)
    out_lpBuffer[MIN(nBufferLength - 1, dwLen)] = 0;
  NTTRACE("GetCurrentDirectory(%u, [%#!hs]) → {%u, %d}", nBufferLength,
          dwLen && dwLen < nBufferLength ? out_lpBuffer : u"n/a", dwLen,
          GetLastError());
  return dwLen;
}
